Which sentence corrects the vague pronoun problem in this sentence?

D.

Explanation:

This is the sentence that best clarifies what the author means. We learn that the author wants to learn biology or math. We also learn that choosing between these two will be difficult. Option D is the only sentence that includes both pieces of information while clarifying how all the ideas are connected in a single sentence.

a. to introduce the audience to important characters .

b. to inform the audience where the story takes place .

e. to lay out specific details about different plot points.